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# PRA027 - pH and pOH Calculations 1 Determine the pH of a...

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pH and pOH Calculations 1) Determine the pH of a 0.0034 M HNO 3 solution. 2) Determine the pOH of a 0.0034 M HNO 3 solution. 3) Determine the pH of a 4.3 x 10 -4 M NaOH solution. 4) If a solution is created by adding water to 2.3 x 10 -4 moles of NaOH and 4.5 x 10 -6 moles of HBr until the final volume is 1 L, what is the pH of this solution? 5) Determine the pH of a 4.5 x 10 -11 M NaOH solution. 6) Why would we say that a solution with a H + concentration of 1.00 x 10 -7 M is said to be neutral. If it contains acid, shouldn’t it be acidic? For chemistry help, visit www.chemfiesta.com © 2002 Cavalcade Publishing – All Rights Reserved

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pH and pOH Calculations - Answers 1) Determine the pH of a 0.0034 M HNO 3 solution. pH = -log[H + ] = -log(0.0034) = 2.47 2) Determine the pOH of a 0.0034 M HNO 3 solution. pH = -log[H + ] = -log(0.0034) = 2.47 pOH = 14 – pH = 14 – 2.47 = 11.53 3) Determine the pH of a 4.3 x 10 -4 M NaOH solution. pOH = -log[OH - ] = -log(4.3 x 10 -4 ) = 3.37 pH = 14 – pOH = 14 – 3.37 = 10.63 4) If a solution is created by adding water to 2.3 x 10 -4 moles of NaOH and 4.5 x 10 -6
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PRA027 - pH and pOH Calculations 1 Determine the pH of a...

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